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UPDATE 7-Oil rises ahead of U.S. weekly inventory figures

* Brent, WTI are up more than 13 pct since early December

* Rising U.S. oil production a threat to tightening markets

* U.S. oil output soars: http://tmsnrt.rs/2DrO0Rm

* Coming up: U.S. weekly oil data by API at 4:30 p.m. (2130 GMT) (Updates prices, adds details of analyst price revisions)

NEW YORK, Jan 17 (Reuters) - Oil prices ended higher on Wednesday ahead of the release of U.S. petroleum data that was expected to show a ninth straight weekly drawdown in crude inventories.

Brent futures settled 23 cents higher at $69.38 a barrel while U.S. West Texas Intermediate (WTI) crude gained 24 cents to $63.97 per barrel.

Both contracts climbed to their highest levels since December 2014 this week with Brent reaching $70.37 on Monday and WTI up to $64.89 on Tuesday.

U.S. crude inventories were estimated to have fallen 3.5 million barrels in the week ended Jan. 12, according to a Reuters poll.

The American Petroleum Institute (API) report will be released at 4:30 p.m. EST (2130 GMT), followed by U.S. Energy Information Administration (EIA) data on Thursday at 11 a.m. EST. Both were delayed by a day due to the U.S. Martin Luther King Jr. Day holiday.

Tighter markets have lifted both crude benchmarks about 13 percent above levels in early December, helped by production curbs by OPEC and Russia, as well as by healthy demand growth. Several analysts this week raised their expectation for 2018 prices on the back of the rally.

In a note on Tuesday, Morgan Stanley said it now sees Brent hitting $75 a barrel by the third quarter of 2018, while U.S. crude could hit $70 a barrel. The firm expected flows from hedge funds to keep prices elevated - even though it saw prices retreating later in the year.

Money managers have raised bullish positions in WTI and Brent crude futures and options to a record, according to the U.S. Commodity Futures Trading Commission and the Intercontinental Exchange.

Norbert Ruecker, head of commodity research at Swiss bank Julius Baer, also said that "hedge fund expectations for further rising prices have reached excessive levels," threatening prices.

The Organization of the Petroleum Exporting Countries and Russia have been curbing production since January 2017; the cuts are set to last through 2018.

The curbs have coincided with strong demand and solid economic growth, tightening the market.

Elsewhere, threats by Nigerian militants on Wednesday to attack offshore oil facilities within days were supportive of prices.

Markets may come under pressure from rising U.S. production, analysts say.

On Tuesday, the EIA said it expected U.S. oil output to increase in February, with production from shale rising by 111,000 barrels per day (bpd) to 6.55 million bpd.

U.S. crude output <C-OUT-T-EIA> is expected to soon break 10 million bpd, challenging top producers Russia and Saudi Arabia.

(Additional reporting by Libby George in London and Henning Gloystein in Singapore; Editing by Marguerita Choy, Tom Brown and Cynthia Osterman)